CN114884642A - Temporary handling of wireless communication device capabilities - Google Patents

Temporary handling of wireless communication device capabilities Download PDF

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Publication number
CN114884642A
CN114884642A CN202210698210.7A CN202210698210A CN114884642A CN 114884642 A CN114884642 A CN 114884642A CN 202210698210 A CN202210698210 A CN 202210698210A CN 114884642 A CN114884642 A CN 114884642A
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China
Prior art keywords
base station
operating parameter
rat
lte
transmitting
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CN202210698210.7A
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Chinese (zh)
Inventor
胡海静
金唯哲
C·W·穆凯
张大伟
M·索尔
J·O·瑟贝尼
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Apple Inc
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Apple Inc
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Priority to CN202210698210.7A priority Critical patent/CN114884642A/en
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/22—Processing or transfer of terminal data, e.g. status or physical capabilities
    • H04W8/24—Transfer of terminal data
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0032—Distributed allocation, i.e. involving a plurality of allocating devices, each making partial allocation
    • H04L5/0035—Resource allocation in a cooperative multipoint environment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W8/00—Network data management
    • H04W8/005—Discovery of network devices, e.g. terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Abstract

The present application relates to temporary handling of wireless communication device capabilities. A wireless communication device, UE, is disclosed herein that may provide information to LTE and 5G-NR networks regarding one or more operational capabilities of the UE. The UE may transmit information directly to the LTE base station and may transmit information directly or indirectly via the LTE base station to the 5G-NR base station. The information may include preferred values corresponding to any number of different operating parameters associated with the wireless communication or wireless communication capabilities of the UE in both the LTE and 5G-NR networks to inform and/or request the LTE and 5G-NR networks to provide for wireless communication of the UE over those networks based on the transmitted information. Accordingly, a UE may provide assistance information to LTE and 5G-NR networks in a multi-radio access technology dual connectivity setting to request the respective networks to adjust certain operational capabilities of the UE in order to mitigate one or more operational issues that may affect the UE.

Description

Temporary handling of wireless communication device capabilities
The application is a divisional application of an invention patent application with application date of 2017, 11 and 17, application number of 201780096872.4 and name of 'temporary handling of wireless communication equipment capability'.
Technical Field
The present application relates to wireless communications and communications devices, and more particularly to temporarily adjusting wireless communications device capabilities during 3GPP and 5G new radio (5G-NR) communications.
Background
The use of wireless communication systems is growing rapidly. In recent years, wireless devices such as smartphones and tablets have become more sophisticated. In addition to supporting telephone calls, many mobile devices now provide access to the internet, email, text messaging, and navigation using the Global Positioning System (GPS), and are capable of operating sophisticated applications that take advantage of these functions.
Long Term Evolution (LTE) has become the technology of choice for most wireless network operators worldwide, providing mobile broadband data and high speed internet access to their user groups. LTE defines a number of Downlink (DL) physical channels, classified as transport or control channels, to carry information blocks received from MAC and higher layers. LTE also defines three physical layer channels for the Uplink (UL).
The Physical Downlink Shared Channel (PDSCH) is the DL transport channel and is the primary data-bearing channel allocated to users on a dynamic and opportunistic basis. The PDSCH carries data in Transport Blocks (TBs) corresponding to medium access control protocol data units (MAC PDUs), which are passed from the MAC layer to the Physical (PHY) layer once per Transmission Time Interval (TTI). The PDSCH is also used to transmit broadcast information such as System Information Blocks (SIBs) and paging messages.
The Physical Downlink Control Channel (PDCCH) is a DL control channel that carries resource allocations of the UE contained in a Downlink Control Information (DCI) message. Multiple PDCCHs may be transmitted in the same subframe using Control Channel Elements (CCEs), each of which is nine sets of four resource elements called Resource Element Groups (REGs). The PDCCH employs Quadrature Phase Shift Keying (QPSK) modulation, with four QPSK symbols mapped to each REG. Furthermore, depending on the channel conditions, 1, 2, 4 or 8 CCEs may be used to ensure sufficient robustness.
The Physical Uplink Shared Channel (PUSCH) is an UL channel shared by all devices (user equipment, UE) in a radio cell to transmit user data to the network. Scheduling of all UEs is under the control of the LTE base station (enhanced node B or eNB). The eNB informs the UE of the Resource Block (RB) allocation and the modulation and coding scheme to use using an uplink scheduling grant (DCI format 0). PUSCH typically supports QPSK and Quadrature Amplitude Modulation (QAM). In addition to user data, the PUSCH carries any control information needed to decode the information, such as transport format indicators and multiple-input multiple-output (MIMO) parameters. The control data is multiplexed with the information data prior to Digital Fourier Transform (DFT) expansion.
The Physical Control Format Indicator Channel (PCFICH) is a DL control channel that carries a Control Format Indicator (CFI) including the number of Orthogonal Frequency Division Multiplexing (OFDM) symbols used for control channel transmission in each subframe (typically 1, 2 or 3). The 32-bit long CFI is mapped to 16 resource elements in the first OFDM symbol of each downlink frame using QPSK modulation.
Therefore, as described above, during data communication through LTE, DL uses a physical channel PDSCH, and DL uses a UL channel PUSCH in UL. Also as described above, these two channels carry transport blocks of data, in addition to some MAC control and system information. To support transmission of DL and UL transport channels, downlink shared channel (DLSCH) and uplink shared channel (ULSCH) control signaling are required. The control information is transmitted in the PDCCH and contains DL resource allocation and UL grant information. The PDCCH is transmitted at the beginning of each subframe in the first OFDM symbol. Depending on the level of robustness that the NW needs to achieve and the PDCCH system capacity (number of users served simultaneously in a TTI), the PDCCH will be transmitted in any of the first 1, 2, 3 or 4 OFDM symbols of the subframe. The number of OFDM symbols used in the PDCCH is signaled in the PCFICH. To improve operation of range-limited devices and/or devices operating in weak coverage areas, blind decoding of PDCCH is developed as a possible mechanism for mitigating the negative effects of poor reception of PCFICH.
The next telecommunication standard proposed beyond the current international mobile telecommunications-Advanced (IMT-Advanced) standard is referred to as the 5 th generation mobile network or 5 th generation wireless system, or 5G for short (also referred to as 5G new radio, 5G-NR for short). Compared to the current LTE standard, 5G-NR offers higher capacity for higher density of mobile broadband users while supporting device-to-device ultra-reliable and large-scale machine communication, as well as lower latency and lower battery consumption. When establishing a 5G-NR network, various development intermediate stages include provision of a multi-radio access technology (multi-RAT) mode of operation for a wireless communication device (or UE) whereby the UE can connect to both LTE and 5G-NR networks. Sometimes, operating a UE may require transmitting information to the network regarding certain operating capabilities of the UE. For example, the UE may need to notify the network that the UE is overheating. While certain specifications have been made for some limited communication of such information from the UE to the LTE network, there is currently no standard mechanism for such communication in 5G-NR networks.
Other corresponding problems associated with the prior art will become apparent to those skilled in the art upon a comparison of such prior art with the disclosed embodiments described herein.
Disclosure of Invention
Embodiments described herein relate to User Equipment (UE) devices, base stations and/or relay stations, and associated methods for a UE to provide information to LTE and 5G-NR networks relating to one or more operational capabilities of the UE. In some embodiments, the UE may transmit information regarding any number of different operating parameters associated with wireless communication of the UE in the LTE and 5G-NR networks (referred to as UE assistance information) to inform and/or request the LTE and 5G-NR networks to provide wireless communication for the UE based on the transmitted information.
At least three different approaches are available for transmitting UE assistance information in a multi-radio access technology (multi-RAT) dual connectivity system, where a UE communicates with an LTE base station (eNB operating as a primary node, MN) and the UE also communicates with an NR base station (a gbb operating as a secondary node, SN), which MN is coupled to an EPC (evolved packet core) network and also communicates with the SN.
In a first approach, LTE UE assistance information may be extended to the NR network, and NR related capability information may be added to or included in the LTE UE assistance information transmission, and the eNB may forward the information to the gNB.
In a second approach, an NR message (e.g., NR RRC message) may be defined and used to report UE assistance information corresponding to UE operational capabilities associated with communications over the NR network. The UE may transmit an LTE message (e.g., an LTE RRC message) to the eNB that encapsulates an NR message (e.g., an NR RRC message) that includes UE assistance information and/or a temporary capability adjustment/restriction request for NR communication. The eNB may forward the LTE message including the encapsulated NR message to the gNB. The UE may also send LTE messages to the eNB including UE assistance information for LTE, and the eNB and the gNB may independently process the respective messages received and may adjust (e.g., reduce) the UE capabilities, if applicable.
In a third method, the UE may transmit separate requests and/or UE assistance information for LTE and NR to the eNB and the gNB, respectively. For example, the UE may transmit an LTE message (e.g., an LTE RRC message) to the eNB that includes LTE UE assistance information or a temporary capability adjustment/restriction request for LTE. Similarly, the UE may transmit an NR message (e.g., NR RRC message) including NR UE assistance information and/or a temporary capability adjustment/restriction request for NR and an LTE message to the gNB, respectively. The eNB and the gNB may independently process the respective messages received (this time directly from the UE) and may adjust (e.g., reduce) the UE capabilities, if applicable.
Thus, in some embodiments, a UE may wirelessly communicate with a first base station in accordance with a first Radio Access Technology (RAT) and with a second base station in accordance with a second RAT. In some embodiments, the first RAT is LTE and the second RAT is 5G-NR (or simply NR). The UE may transmit assistance information to the first base station, the assistance information including first preferred values corresponding to one or more first operating capabilities of the UE associated with communicating according to the first RAT, and further including second preferred values corresponding to one or more second operating capabilities of the UE associated with communicating according to the second RAT. The second preference value may be forwarded by the first base station to the second base station. The UE may transmit with the first base station according to the adjusted or unadjusted first operating capability depending on whether the first base station adjusted the first operating capability according to the first preference value. The UE may similarly transmit with the second base station according to the adjusted or unadjusted second operating capability depending on whether the second base station adjusted the second operating capability according to the second preference value.
The UE may transmit assistance information in a first RAT Radio Resource Control (RRC) message (e.g., an LTE RRC message). Further, the UE may transmit assistance information in response to operational issues of the UE, which may include the UE overheating, consuming more than a specified amount of power, experiencing in-device coexistence performance issues, and/or hardware sharing issues. The UE may include a second preference value in a second RAT (e.g., NR) radio resource control message encapsulated in a first RAT (e.g., LTE) radio resource control message, and the first RAT radio resource control message may then be forwarded by the first base station to the second base station. The UE may also transmit a message to the first base station indicating that at least one of the first operational capability or the second operational capability no longer needs to be adjusted. In some embodiments, the UE may transmit with the first base station according to the unadjusted first operating capability upon expiration of a first timer in the first base station if the first base station adjusts the first operating capability, and may also transmit with the second base station according to the unadjusted second operating capability upon expiration of a second timer in the second base station if the second base station adjusts the second operating capability.
In some embodiments, a UE may wirelessly communicate with a first base station according to a first RAT (e.g., LTE) and may also communicate with a second base station according to a second RAT (e.g., 5G-NR). The UE may transmit first assistance information to the first base station, wherein the first assistance information includes first preferred values corresponding to one or more first operational capabilities of the UE associated with communicating according to the first RAT. The UE may transmit second assistance information to the second base station, wherein the second assistance information includes second preferred values corresponding to one or more second operational capabilities of the UE associated with communicating according to the second RAT. The UE may then transmit with the first base station according to the adjusted or unadjusted first operating capability, depending on whether the first base station adjusted the first operating capability according to the first preference value. Similarly, the UE may transmit with the second base station according to the adjusted or unadjusted second operational capability depending on whether the second base station adjusted the second operational capability according to the second preference value. The UE may transmit first assistance information in a first RAT RRC message (e.g., an LTE RRC message) to the first base station and may transmit second assistance information in a second RAT RRC message (e.g., an NR RRC message) to the second base station.
This summary is intended to provide a brief overview of some of the subject matter described in this document. Thus, it should be understood that the above-described features are merely examples and should not be construed to narrow the scope or spirit of the subject matter described herein in any way. Other features, aspects, and advantages of the subject matter described herein will become apparent from the following detailed description, the accompanying drawings, and the claims.
Drawings
Fig. 1 illustrates an exemplary (and simplified) wireless communication system according to some embodiments;
fig. 2 illustrates a base station in communication with a wireless User Equipment (UE) device, in accordance with some embodiments;
fig. 3 is an exemplary block diagram of a UE according to some embodiments;
fig. 4 illustrates an example block diagram of a base station in accordance with some embodiments;
fig. 5 illustrates an exemplary block diagram showing various multi-RAT dual-connectivity wireless communication systems, according to some embodiments;
fig. 6 illustrates an example timing diagram showing transmission of an LTE RRC message including UE assistance information for NR, according to some embodiments;
fig. 7 illustrates an example timing diagram showing transmission of an LTE RRC message including an encapsulated NR RRC message including UE assistance information for NR, in accordance with some embodiments; and
fig. 8 illustrates an example timing diagram showing transmission of an LTE RRC message including UE assistance information and transmission of a separate NR RRC message including UE assistance information, in accordance with some embodiments.
While the features described herein are susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and are herein described in detail. It should be understood, however, that the drawings and detailed description thereto are not intended to limit the disclosure to the particular form disclosed, but on the contrary, the intention is to cover all modifications, equivalents and alternatives falling within the spirit and scope of the subject matter as defined by the appended claims.
Detailed Description
Acronyms
Various acronyms are used throughout this application. The definitions of the most prominent acronyms used, which may appear throughout this application, are as follows:
ACK: confirmation
BS: base station
CCE: control channel element
CFI: control format indicator
CQI: channel quality indicator
CRC: cyclic redundancy check
DCI: downlink control information
DL: downlink (from BS to UE)
DLSCH: downlink shared channel
FDD: frequency division duplexing
FEC: forward error correction
GPS: global positioning system
GSM: global mobile communication system
LTE: long term evolution
MIMO: multiple input multiple output
NACK: negative acknowledgement
NW: network
OFDM: orthogonal frequency division multiplexing
PCFICH: physical control format indicator channel
PDCCH: physical downlink control channel
PDSCH: physical downlink shared channel
PDU: protocol data unit
PHICH: physical HARQ indicator channel PUSCH: physical uplink shared channel
PHY: physics (layer)
REG: resource element group
RRC: radio resource control
RSRP: reference signal received power
RSSI: reference signal strength indicator
RX: receiving
SINR: signal to interference plus noise ratio
TB: transmission block
TBS: transport block size
TDD: time division duplex
TTI: transmission time interval
TX: launching
UE: user equipment
UEAI: UE assistance information
UL: uplink (from UE to BS)
ULSCH: uplink shared channel
UMTS: universal mobile telecommunications system
Term(s) for
The following is a glossary of terms that may appear in this application:
memory medium-any of various types of memory devices or storage devices. The term "memory medium" is intended to include mounting media such as a CD-ROM, floppy disk 104, or tape device; computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, Rambus RAM, etc.; non-transitory memory such as flash memory, magnetic media, e.g., a hard disk drive or optical storage; registers, or other similar types of memory elements, etc. The memory medium may also include other types of memory or combinations thereof. Further, the memory medium may be located in a first computer system executing the program, or may be located in a different second computer system connected to the first computer system through a network such as the internet. In the latter example, the second computer system may provide the program instructions to the first computer system for execution. The term "memory medium" may include two or more memory media that may reside at different locations in different computer systems, e.g., connected by a network.
Carrier medium-a memory medium as described above, and a physical transmission medium such as a bus, a network, and/or other physical transmission medium that conveys signals such as electrical, electromagnetic, or digital signals.
Computer system (or computer) -any of various types of computing systems or processing systems, including Personal Computer Systems (PCs), mainframe computer systems, workstations, network appliances, internet appliances, Personal Digital Assistants (PDAs), television systems, grid computing systems, or other devices or combinations of devices. In general, the term "computer system" may be broadly defined to encompass any device (or combination of devices) having at least one processor that executes instructions from a memory medium.
User Equipment (UE) (or "UE device") -any of a variety of types of computer system devices that are mobile or portable and perform wireless communications. Also known as wireless communication devices. Examples of UE devices include mobile phones or smart phones (e.g., iphones) TM Based on Android TM Telephone) and tablet computers, such as ipads TM 、Samsung Galaxy TM Etc., portable gaming devices (e.g., Nintendo DS) TM 、PlayStation Portable TM 、Gameboy Advance TM 、iPod TM ) Laptop, wearable device (e.g., Apple Watch) TM 、Google Glass TM ) A PDA, portable internet appliance, music player, data storage device or other handheld device, etc. If various other types of devices include Wi-Fi or both cellular and Wi-Fi communication capabilities and/or other wireless communication capabilities, for example, via a short-range radio access technology (SRAT) such as BLUETOOTH TM Etc., then these devices may fall into this category. In general, the term "UE" or "UE device" may be broadly defined to encompass any electronic, computing, and/or telecommunications device (or combination of devices) that is readily transportable by a user and capable of wireless communication.
Base Station (BS) -the term "base station" has its full scope of ordinary meaning and includes at least a wireless communication station installed at a fixed location and used to communicate as part of a wireless telephone system or radio system.
Processing element-refers to various elements or combinations of elements capable of performing functions in a device (e.g., a user equipment device or a cellular network device). The processing elements may include, for example: a processor and associated memory, portions or circuitry of individual processor cores, an entire processor core, a processor array, circuitry such as an ASIC (application specific integrated circuit), programmable hardware elements such as Field Programmable Gate Arrays (FPGAs), and any of the above in various combinations.
Wireless device (or wireless communication device) -any of various types of computer system devices that perform wireless communication using WLAN communication, SRAT communication, Wi-Fi communication, and so forth. As used herein, the term "wireless device" may refer to a UE device or a fixed device such as a fixed wireless client or a wireless base station as defined above. For example, the wireless device may be a wireless station of any type of 802.11 system, such as an Access Point (AP) or a client station (UE), or a wireless station of any type of cellular communication system that communicates according to a cellular radio access technology (e.g., LTE, CDMA, GSM), such as a base station or a cellular phone, for example.
Auto-refers to an action or operation performed by a computer system (e.g., software executed by a computer system) or device (e.g., circuit, programmable hardware element, ASIC, etc.) without user input directly specifying or performing the action or operation. Thus, the term "automatically" is in contrast to a user manually performing or specifying an operation, wherein the user provides input to directly perform the operation. An automatic process may be initiated by input provided by a user, but subsequent actions performed "automatically" are not specified by the user, i.e., are not performed "manually," where the user specifies each action to be performed. For example, a user filling out an electronic form by selecting each field and providing input specifying information (e.g., by typing information, selecting a check box, radio selection, etc.) is manually filling out the form, even though the computer system must update the form in response to user action. The form may be automatically filled in by a computer system, wherein the computer system (e.g., software executing on the computer system) analyzes the fields of the form and fills in the form without any user entering answers specifying the fields. As indicated above, the user may invoke automatic filling of the form, but not participate in the actual filling of the form (e.g., the user does not manually specify answers to the fields but they are done automatically). This specification provides various examples of operations that are automatically performed in response to actions that have been taken by a user.
Configured-various components may be described as "configured to" perform one or more tasks. In such an environment, "configured to" is a broad expression generally meaning "having a" structure "that performs one or more tasks during operation. Thus, a component can be configured to perform a task even when the component is not currently performing the task (e.g., a set of electrical conductors can be configured to electrically connect a module to another module even when the two modules are not connected). In some environments, "configured to" may be a broad recitation of structure generally meaning "having circuitry that performs one or more tasks during operation. Thus, a component can be configured to perform a task even when the component is not currently on. In general, the circuitry forming the structure corresponding to "configured to" may comprise hardware circuitry. For ease of description, various components may be described as performing one or more tasks. Such description should be construed to include the phrase "configured to". The expression a component configured to perform one or more tasks is expressly intended to exclude from reference such component an interpretation of section 112, section six, heading 35 of the united states code.
Fig. 1 and 2-communication system
Fig. 1 illustrates an exemplary (and simplified) wireless communication system. It is noted that the system of fig. 1 is merely an example of one possible system, and that the embodiments may be implemented in any of a variety of systems, as desired. As shown, the exemplary wireless communication system includes a base station 102 that communicates with one or more user devices 106A-106N over a transmission medium. Each user equipment may be referred to herein as a "user equipment" (UE) or UE device. Thus, the user equipment 106A-106N are referred to as UEs or UE devices. Further, when referring generally to a standalone UE, the user equipment is also referred to herein as UE 106 or simply UE.
The base station 102 may be a Base Transceiver Station (BTS) or a cell site and may include hardware to enable wireless communication with the UEs 106A-106N. The base station 102 may also be equipped to communicate with a network 100 (e.g., a core network of a cellular service provider, a telecommunications network such as the Public Switched Telephone Network (PSTN), and/or the internet, as well as various possible networks). Accordingly, the base station 102 may facilitate communication between user equipment and/or between user equipment and the network 100. Base station 102 may also communicate with other base stations, as will be described further below. The communication area (or coverage area) of a base station may be referred to as a "cell". As also used herein, with respect to a UE, a base station may be considered to represent a network, sometimes taking into account uplink and downlink communications for the UE. Thus, a UE communicating with one or more base stations in a network may also be understood as a UE communicating with the network. It should also be noted that "cell" may also refer to a logical identity for a given coverage area at a given frequency. In general, any individual cellular radio coverage area may be referred to as a "cell". In such a case, the base station may be located at a specific intersection of three cells. In this uniform topology, the base station may serve three 120-degree beamwidth regions called cells. Also, for carrier aggregation, small cells, relays, etc. may all represent cells. Thus, especially in carrier aggregation, there may be a primary cell and a secondary cell that may serve at least partially overlapping coverage areas but on different respective frequencies. For example, a base station may serve any number of cells, and the cells served by the base station may or may not be collocated (e.g., remote radio heads).
The base station 102 and the user equipment may be configured to communicate by way of a transmission medium using any of a variety of Radio Access Technologies (RATs), also referred to as wireless communication technologies or telecommunication standards, such as GSM, UMTS (WCDMA), LTE-Advanced (LTE-a),% G-NR (or simply NR), 3GPP2 CDMA2000 (e.g., 1xRTT, 1xEV-DO, HRPD, eHRPD), Wi-Fi, WiMAX, and so forth. In some embodiments, the base station 102 communicates with at least one UE using the control indicator for (or associated with) the physical control channel disclosed herein.
The UE 106 is capable of communicating using multiple wireless communication standards or Radio Access Technologies (RATs). For example, the UE 106 may be configured to communicate using any or all of a 3GPP cellular communication standard, such as LTE, or a 3GPP2 cellular communication standard, such as a cellular communication standard in the CDMA2000 series of cellular communication standards, or a 5G-NR (new radio standard). In some embodiments, the UE 106 may be configured to communicate with the base station 102 using a control indicator for (or corresponding to/associated with) a physical control channel as described herein. Base station 102 and other similar base stations operating according to the same or different cellular communication standards may thus be provided as one or more cell networks that may provide continuous or near-continuous overlapping service to UEs 106 and similar devices over a wide geographic area via one or more cellular communication standards.
The UE 106 may also or alternatively be configured to communicate using WLAN, Bluetooth, one or more global navigation satellite systems (GNSS, e.g., GPS or GLONASS), one and/or more mobile television broadcast standards (e.g., ATSC-M/H or DVB-H), and/or the like. Other combinations of wireless communication standards, including more than two wireless communication standards, are also possible.
Fig. 2 illustrates an exemplary system in which a user equipment 106 (e.g., one of devices 106A-106N) communicates with a base station 102. The UE 106 may be a device with wireless network connectivity, such as a mobile phone, a handheld device, a wearable device, a computer, or a tablet, or virtually any type of wireless device. The UE 106 may include a processor configured to execute program instructions stored in a memory. The UE 106 may perform any of the method embodiments described herein by executing such stored instructions. Alternatively or additionally, the UE 106 may include a programmable hardware element, such as an FPGA (field programmable gate array) configured to perform any of the method embodiments of providing control indicators for (or corresponding to/associated with) physical control channels as described herein, or any portion of any of the method embodiments of providing control indicators for (or corresponding to/associated with) physical control channels as described herein. The UE 106 may be configured to communicate using any of a number of wireless communication protocols. For example, the UE 106 may be configured to communicate using two or more of CDMA2000, LTE-A, 5G-NR (or simply NR), WLAN, or GNSS. Other combinations of wireless communication standards are possible.
The UE 106 may include one or more antennas for communicating using one or more wireless communication protocols. In some embodiments, the UE 106 may share one or more portions of a receive chain and/or a transmit chain among multiple wireless communication standards. The shared radio may include a single antenna, or may include multiple antennas for performing wireless communications (e.g., for MIMO). Alternatively, the UE 106 may include separate transmit and/or receive chains (e.g., for each wireless communication protocol configured to communicate therewith)Including separate antennas and other radio components). As another alternative, the UE 106 may include one or more radios shared between multiple wireless communication protocols, as well as one or more radios used exclusively by a single wireless communication protocol. For example, UE 106 may include a transceiver for communicating using either LTE or CDMA 20001 xRTT or 5G-NR and/or using Wi-Fi and BLUETOOTH TM Each of which communicates. Other configurations are also possible.
FIG. 3-exemplary block diagram of a UE
Fig. 3 shows an exemplary block diagram of the UE 106. As shown, the UE 106 may include a System On Chip (SOC)300, which may include portions for various purposes. For example, as shown, SOC 300 may include a processor 302 that may execute program instructions for UE 106, and display circuitry 304 that may perform graphics processing and provide display signals to display 360. The processor 302 may also be coupled to a Memory Management Unit (MMU)340, which may be configured to receive addresses from the processor 302 and translate those addresses to locations in memory (e.g., memory 306, Read Only Memory (ROM)350, NAND flash memory 310) and/or other circuits or devices, such as the display circuitry 304, radio 330, connector I/F320, and/or display 360. MMU 340 may be configured to perform memory protections and page table translations or settings. In some embodiments, MMU 340 may be included as part of processor 302.
As shown, the SOC 300 may be coupled to various other circuits of the UE 106. For example, UE 106 may include various types of memory (e.g., including NAND flash memory 310), a connector interface 320 (e.g., for coupling to a computer system), a display 360, and wireless communication circuitry 330 (e.g., for LTE, LTE-a, 5G-NR, CDMA2000, BLUETOOTH) TM Wi-Fi, GPS, etc.). The UE device 106 may include at least one antenna 335, and possibly multiple antennas 335, for performing wireless communications with base stations and/or other devices. For example, the UE device 106 may perform wireless communication using the antenna 335. As described above, in some embodiments, a UE mayIs configured to wirelessly communicate using a plurality of wireless communication standards.
As described further herein subsequently, both the UE 106 and the base station 102 may include hardware components and software components for implementing methods for the UE to provide information to LTE and 5G-NR networks regarding one or more operational capabilities of the UE. In some embodiments, a UE may transmit information regarding any number of different operating parameters associated with wireless communication of the UE in LTE and NR (5G-NR) networks to inform and/or request one or more LTE and/or 5G-NR networks to provide wireless communication for the UE based on the transmitted information, e.g., by adjusting various operating parameters associated with wireless communication of the UE (also referred to herein as adjusting "the capability of the UE"). For example, the processor 302 of the UE device 106 may be configured to implement a portion or all of a method for a UE to transmit information regarding any number of different operating parameters associated with wireless communications of the UE in LTE and 5G-NR networks to inform and/or request the LTE and 5G-NR networks to adjust the capabilities of the UE based at least on the transmitted information. In other embodiments, the processor 302 may be configured as a programmable hardware element such as an FPGA (field programmable gate array), or as an ASIC (application specific integrated circuit). Further, as shown in fig. 3, the processor 302 may be coupled to and/or interoperate with other components, such as the radio component 330, to implement a configuration control indicator for (or corresponding to/associated with) a physical control channel, according to various embodiments disclosed herein.
FIG. 4-exemplary block diagram of a base station
Fig. 4 shows an exemplary block diagram of the base station 102. It is noted that the base station of fig. 4 is only one example of possible base stations. As shown, base station 102 may include a processor 404 that may execute program instructions for base station 102. Processor 404 can also be coupled to a Memory Management Unit (MMU)440 or other circuit or device that can be configured to receive addresses from processor 404 and translate the addresses to locations in memory (e.g., memory 460 and Read Only Memory (ROM) 450).
The base station 102 may include at least one network port 470. The network port 470 may be configured to couple to a telephone network and provide a plurality of devices, such as the UE device 106, with access to the telephone network as described above in fig. 1 and 2. The network port 470 (or additional network port) may also or alternatively be configured to couple to a cellular network, such as a core network of a cellular service provider. The core network may provide mobility-related services and/or other services to multiple devices, such as UE device 106. In some cases, the network port 470 may be coupled to a telephone network via a core network, and/or the core network may provide the telephone network (e.g., in other UE devices served by a cellular service provider). The core network may provide mobility-related services and/or other services to multiple devices, such as UE device 106. In some cases, the network port 470 may be coupled to a telephone network via a core network, and/or the core network may provide the telephone network (e.g., in other UE devices served by a cellular service provider).
The base station 102 may include at least one antenna 434 and may include multiple antennas 434. The antenna 434 may be configured to operate as a wireless transceiver and may be further configured to communicate with the UE device 106 via the radio 430. Antenna 434 communicates with radio 430 via communication link 432. Communication chain 432 may be a receive chain, a transmit chain, or both. Radio 430 may be configured to communicate via various wireless telecommunication standards including, but not limited to, LTE-A, NR (5G-NR), WCDMA, CDMA2000, and the like. A processor 404 of the base station 102 can be configured to implement some or all of the information methods described herein for receiving information from a UE regarding any number of different operating parameters associated with wireless communication of the UE in LTE and 5G-NR networks to adjust the capability of the UE based at least on the received information, e.g., by executing program instructions stored on a memory medium (e.g., a non-transitory computer-readable memory medium). Alternatively, the processor 404 may be configured as a programmable hardware element such as an FPGA (field programmable gate array) or as an ASIC (application specific integrated circuit) or a combination thereof. In general, the various components (460, 450, 440, 404, 430, 432, 470, and 434) of BS 102 may interoperate to implement at least a portion or all of the methods described herein for receiving information and/or requests from UEs regarding any number of different operating parameters associated with wireless communication of UEs in LTE and 5G-NR networks to adjust (e.g., reduce) the capabilities of the UEs based at least on the received information/request or requests.
Multi-radio access technology (multi-RAT) dual connectivity
As previously mentioned, the next generation wireless standard (referred to as 5G-NR or simply NR) offers higher capacity for higher density mobile broadband communications, and with the establishment of NR networks, various intermediate stages of development have been proposed to provide multiple radio access technology (multi-RAT) modes of operation for wireless communication devices (or UEs) whereby UEs can connect to both LTE and NR networks. The LTE network operates according to an Evolved Packet Core (EPC) framework that provides aggregated voice and data over the LTE network. When 2G and 3G network architectures process and exchange voice and data through two separate sub-domains, Circuit Switched (CS) for voice and Packet Switched (PS) for data, the EPC unifies voice and data on an Internet Protocol (IP) service architecture, where voice is treated as another IP application.
Thus, two main modes of operation of the UE have been identified to accommodate the establishment of the NR network, while the UE is also operating on the LTE network. The "stand-alone" or SA mode of operation represents a stand-alone NR option that does not require an already deployed LTE network core. SA (or SA NR) operation exploits the new NR core network architecture that 3GPP is also developing, implying full user and control plane capabilities of the NR. The "non-standalone" or NSA mode of operation represents 3GPP LTE deployments with anchoring and NR carriers to improve throughput speed and reduce network latency. The NSA mode of operation aims at speeding up NR scheduling by introducing an intermediate stage of early completion of NR variants, referred to as NSA (or NSA NR) mode of operation, which enables 3 GPP-based large-scale experimentation and deployment. The NSA mode of operation utilizes existing LTE radios and the core network as anchors for mobility management and coverage while adding new NR (5G-NR) carriers.
In accordance with the above, a multi-RAT dual connection (MR-DC) for UEs connected to LTE and NR networks is defined. Thus, MR-DC allows UEs to connect to both enbs (LTE base stations) and gnbs (NR base stations) simultaneously. From the core network, the primary node (MN) and the Secondary Node (SN), three main connection modes can be defined: EN-DC, NGEN-DC, and NE-DC, as shown in FIG. 5. The exemplary EN-DC system 520 shown in fig. 5 includes an eNB 504 connected to the EPC network 502 as a MN. MN eNB 504 may also communicate with a gNB 506, which may serve as a SN. Finally, UE 106 may communicate with eNB 504 and gNB 506 separately and independently. As shown in fig. 5, in the first phase of 5G (or NR), the network is designed to operate in EN-DC mode 520, where the gNB 506 (operating as an SN) communicates with the EPC network 502 through the eNB 504 (operating as an MN). In EN-DC, control and data are transmitted/received through the eNB and the gNB, respectively. In the NSA mode of operation, MR-DC operation occurs with only the MN (eNB 504 in this case) connected to the core network (EPC 502 in this case). Fig. 5 also shows a NGEN-DC (next generation) 530 system where a next generation eNB 510 (operating as a MN) is connected to a 5G core (5GC) network and a gNB 506 (operating as a SN) communicates with the ng-eNB 510, the UE 106 communicating separately and independently with the ng-eNB 510 and the gNB 506. Finally, fig. 5 shows NE-DC system 540, where a gNB 506 is operatively connected to 5GC network 508 as a MN and ng-eNB 510 is in communication with gNB 506 as a SN operation. Likewise, UE 106 communicates with ng-eNB 510 and gNB 506 separately and independently.
UE operational capabilities and operational parameters
As previously mentioned, sometimes a UE may need to communicate information to the network regarding certain operational capabilities of the UE. For example, the UE may need to inform the network that the UE is overheated. Thus, it may be useful for a UE to communicate information to the network regarding certain operating parameters of the UE. LTE UEs support high data rates with multiple MIMO (multiple input multiple output) layers, higher order modulation, and Carrier Aggregation (CA). Thus, LTE UEs may often experience overheating issues when supporting high rates with the above-described features enabled. Therefore, a protocol is reached that provides LTE UEs with notification of network internal overheating by transmitting certain information to the network as dedicated "UE assistance information". The information may include information related to the category of the UE (adjusted/reduced UE category for UL/DL) and information related to the number of component carriers (CC; number of adjusted/reduced CCs for UL/DL).
A protocol is reached that implements a temporary capability adjustment/restriction mechanism in NR SA operation to temporarily limit the capability of the UE in order to solve and handle problems such as UE overheating, hardware sharing, interference, etc. The UE may transmit a temporary capability restriction request to the network, and the network may acknowledge or deny such request. However, the details of any temporary capacity limitation mechanism of NR SA have not been identified. In other words, there is currently no agreed mechanism for handling NR UE overheating in NSA operation. In the NSA mode of operation, given that NR supports very large bandwidths (up to 400 MHz/carrier), higher peak data rates with higher modulation orders (up to 256QAM), up to 8MIMO layers and many aggregated carriers (< ═ 16), it is likely that NR communications are more likely to cause UE overheating than LTE communications. Therefore, a mechanism of superheat treatment that introduces NR in NSA mode is desirable. More generally, it is desirable to introduce an integrated mechanism for handling UE capability adjustments initiated by UEs with LTE and NR networks, for example, by enabling a UE to communicate information related to various operating parameters of the UE to the LTE and/or NR networks to reduce power consumption, reduce workload on various hardware components of the UE, address interference issues, hardware sharing issues, and/or various other operating characteristics, and to enable the network to adjust/reduce the capabilities of the UE based on the information.
UE assistance information transfer options
In some embodiments, at least three different transmission schemes or options may be designed for transmitting UE assistance information (UEAI).
Option 1: LTE UEAI is extended to NR networks whereby NR related capability information can be added to/included in LTE UEAI transmissions. The eNB may forward the information to the gNB. For example, in the EN-DC system 520 shown in fig. 5, the UE 106 may transmit LTE UEAI including NR capability information to the eNB 504, and the eNB 504 may forward the NR capability information to the gNB 506. Both eNB 504 and gNB 506 may adjust (e.g., reduce) UE capabilities, where applicable.
Option 2: the temporary capability adjustment/limitation applies to the NSA mode of operation. An NR message (e.g., NR RRC message) may be defined for reporting information corresponding to UE operational capabilities associated with NR communications. The reporting of the UE may be in response to certain operational issues of the UE, such as overheating of the UE. Accordingly, the UE may report/transmit information related to various operating parameters of the UE that may affect the operating capabilities of the UE. For example, in addition to transmitting a temporary capability adjustment/restriction request for LTE or LTE UEAI, the UE may also transmit a temporary capability adjustment/restriction request for NR or NR UEAI. Referring again to EN-DC system 520 of fig. 5, UE 106 may transmit an LTE message (e.g., an LTE RRC message) to eNB 504 that encapsulates an NR message (e.g., an NR RRC message) that includes an NR UEAI and/or a temporary capability adjustment/restriction request for NR. The eNB 504 and the gNB 506 may independently process the respective messages received and may adjust (e.g., reduce) the UE capabilities, if applicable.
Option 3: the UE may transmit separate requests and/or UEAIs for LTE and NR. For example, referring again to the EN-DC system 520 of fig. 5, the UE 106 may transmit an LTE message (e.g., an LTE RRC message) to the eNB 504 that includes an LTE UEAI and/or a temporary capability adjustment/restriction request for LTE. Similarly, the UE 106 may transmit an NR message (e.g., NR RRC message) that includes an NR UEAI and/or a temporary capability adjustment/restriction request for NR, respectively, with an LTE message. The eNB 504 and the gNB 506 may independently process the respective messages received (this time directly from the UE) and may adjust (e.g., reduce) the UE capabilities, if applicable.
Option 1
As mentioned above, LTE UEAI is also extended to include NR related capabilities. Thus, information relating to a number of UE operating parameters may be included in the message including the UE ai. As mentioned before, the operating parameters that LTE already comprises are the category of the UE (adjusted/reduced UE category for UL/DL) and information about the number of component carriers (CC; adjusted/reduced number of CCs for UL/DL). Information about these parameters may be incorporated as fields within LTE UEAI. For example, LTE UEAI includes the following fields:
reduced UE-Category DL (adjust UE Category for DL)
Reduced UE-Category UL (adjusted UE Category for UL)
Reduced CC Dl (adjusting the number of CCs for DL)
Reduced CC UL (number of CCs adjusted for DL)
In accordance with the above, in some embodiments, the following fields may be included in LTE UEAI for NR:
reduced UE-Category DL NR (adjusting the UE Category of DL for NR)
Reduced UE-Category UL NR (UE Category for adjusting UL for NR)
Reduced UE-Category DL NR for MR-DC (adjusting NR UE Category for DL in MR-DC mode of operation)
Reduced UE-Category UL NR for NR-DC (adjusting the UE Category for UL of NR in MR-DC mode of operation)
Reduced CC DL NR (adjusting the number of CCs of DL for NR)
Reduced CC UL NR (adjusting the number of CCs for UL of NR)
Side information related to physical layer modulation of NR may be included as a field. Reducing the complexity of the modulation scheme may limit the maximum amount of data, which may reduce the operational load on the hardware and the UE, thereby reducing power consumption. Thus, the following fields may be included in LTE UEAI for NR:
reduced Modulation Scheme NR — a Reduced Modulation Scheme may limit the maximum data rate supported
Reduced MIMO layers NR (adjusting the number of MIMO layers for NR) -reducing MIMO layers effectively reduces the maximum data rate supported
Reduced CA Band Combination NR (adjusting the number of frequency bands used in CA for NR) -this CA Band Combination may comprise a preferred set of Band combinations that the UE can support
Reduced maximum TBS for DL-shared-channel/UL-shared-channel NR (TBS adjusted for NR) -limiting TBS Peak throughput
Reduced maximum size of Layer-2(L2) buffers NR (adjusting the maximum size of NR's L2 buffer) -limiting buffer size can reduce throughput
A Resource Element (RE) in NR is a minimum unit of a resource grid composed of one subcarrier in a frequency domain and one OFDM symbol in a time domain. A Resource Element Group (REG) in NR consists of one resource block (12 resource elements in the frequency domain) and one OFDM symbol in the time domain. The REG bundle in NR consists of multiple REGs. The Control Channel Element (CCE) in NR consists of up to 6 REGs. The number of REG bundles within a CCE may vary. The control resource set (CORESET) in NR consists of a number of resource blocks (e.g., multiples of 12 REs) in the frequency domain with 1 or 2 or 3 OFDM symbols in the time domain. CORESET thus defines time frequency resources. The CORESET monitoring essentially involves the UE monitoring the PDCCH. Assistance information related to PDCCH for NR may also be included as a field in LTE UEAI.
Minimum CORESET monitoring period NR-increasing the Minimum CORESET monitoring period may provide the UE with time to enter a microsleep mode between two CORESETs without PDCCH monitoring and therefore PDSCH scheduling, which may reduce power consumption and reduce heat generation.
Minimum UE-specific search monitoring period NR (adjusting the UE-specific search space monitoring period for NR) -increasing the Minimum search space monitoring period may provide the UE with time to enter a micro sleep mode between two search spaces without PDCCH monitoring, which may reduce power consumption and reduce heat generation.
Minimum Cell-specific search space monitoring period NR (adjusting the Cell-specific search space monitoring period for NR) -increasing the Minimum search space monitoring period may provide the UE with time to enter a micro sleep mode between two search spaces without PDCCH monitoring, which may reduce power consumption and reduce heat generation.
Maximum number of connected slots PDCCH monitored NR-this may limit the Maximum number of slots that the UE can continuously monitor until the next CORESET monitoring occasion (similar to the on-duration in C-DRX for LTE). This may limit the amount of power and heat generated during one cycle of CORESET monitoring.
Maximum number of contiguous slots data (PDSCH/PUSCH) scheduled NR (adjusting the Maximum number of consecutive slots for NR that data is transmitted during DL/UL) -this may limit the Maximum number of slots that can be continuously scheduled for a UE. This may limit the amount of power and heat generated during one cycle of CORESET monitoring. Data transmission requires more processing power than PDCCH monitoring.
Maximum number of blind decoding per slot NR (adjust the Maximum number of blind decodes performed during a slot) -limiting the number of blind decodes can save UE power and potentially reduce heat generation.
Assistance information related to PDCCH-PDSCH-ACK timing for NR may also be included as a field in LTE UEAI. Four K values are defined for NR: k0 corresponds to the time difference between transmission of PDCCH and PDSCH, K1 corresponds to the time difference between transmission of PDSCH and corresponding ACK, K2 corresponds to the time difference between transmission of PDCCH and PUSCH, and K3 corresponds to the time difference between transmission of PUSCH and corresponding ACK. These K values may be dynamically signaled to the UE or may be semi-statically configured. The selection of the corresponding value of K by the UE may reduce processing requirements, thereby reducing power consumption and overheating. Accordingly, the following side information related to PDCCH-PDSCH-ACK timing for NR may be included as fields in LTE UEAI.
Preferred set of K0 values NR (adjustment of K0 value for NR)
Case 1: for cross-slot scheduling (due to dynamic switching between narrowband and wideband), a K0 value >0 may be required. In cross-slot scheduling, the PDCCH and PDSCH are transmitted in different slots. The PDCCH is scheduled first and then the PDSCH is scheduled. The PDCCH may be received through a Narrow Band (NB), and the PDSCH may be received through a Wide Band (WB).
Case 2: if the CORESET monitoring periodicity is 2, K0 ═ 0 can save UE power because the UE enters the micro sleep mode every other slot. If K is 0, the PDCCH and the PDSCH (same slot) are transmitted simultaneously. If K is 0, the UE may avoid the power ramp down/up time for transitioning from PDCCH monitoring to microsleep mode to PDSCH data transmission.
Preferred set of K1 values NR (adjusted K1 value for NR) -when the CORESET monitoring periodicity is, for example, 5, if K1 is 0, the UE receives the PDSCH and sends the corresponding ACK in the same slot, which may save one modem power ramp down and ramp up period between the PDSCH reception slot and the ACK transmission slot, which may potentially reduce UE power consumption and potentially prevent overheating.
Preferred set of K2 values NR (adjust K2 value for NR) -if K2 is 0, the UE receives the UL grant and transmits the PUSCH in the same slot, which may save cycles of modem power ramp down and ramp up between UL grant and PUSCH transmission, which may potentially reduce UE power consumption and potentially prevent overheating.
Preferred set of K3 values NR (adjust K3 value for NR) -if K3 is 1, the UE transmits PUSCH in a slot and receives ACK in the next slot, which may save cycles of modem power ramp down and ramp up between PUSCH transmission and ACK reception, which may potentially reduce UE power consumption and potentially prevent overheating.
Assistance information related to bandwidth part for NR (BWP) and RF parameters may also be included as fields in LTE UEAI. BWP is a subset of the maximum RF channel Bandwidth (BW) of the UE. For example, for each UE, the maximum BW may be divided into four (4) BWPs. Accordingly, the following assistance information related to BWP and RF parameters for NR may be included in LTE UEAI.
Max size of BWP DL/UL NR (adjusting BWP size for NR) -limiting the maximum size of BWP for NR's DL/UL can potentially reduce UE power consumption or prevent overheating by limiting sampling rate and buffering requirements. In one sense, this means dynamically adjusting the BWP based on the amount of data transmitted. When BWP is large but only transmits a small amount of data, the UE may be wasting power.
Preferred set of BWPs DL/UL NR (using the Preferred BWP indicated by the UE for NR) -the UE may indicate a Preferred set of BWPs for DL. The preferred BWP may be specified by the UE or may be selected from BWPs configured by the network. For example, the UE may indicate which available BWP is preferred (used) by the UE.
Max number of active BWP DL/UL NR (adjust the maximum number of BWPs for DL/UL of NR-more than one active DL/UL BWP may be supported in this case, limiting the number of BWPs may reduce UE power consumption and prevent overheating.
Preferred BWP change timer value NR (adjust BWP change timer value for NR UE) -upon expiration of the BWP timer, the UE is expected to change its active BWP to the default BWP. By controlling the timer value, the UE may potentially affect UE power consumption and heat generation. For example, decreasing the BWP change timer value by the UE may result in the BWP value changing (using) faster to a default BWP, which may be a narrow BW (e.g., for monitoring control channels), which may also reduce power consumption when moving from a higher BW BWP to a lower BW BWP.
Reduced Maximum UE channel bandwidth DL/UL NR (adjusting the Maximum UE channel bandwidth for NR) -similar to "Max size of BWP DL/UL NR" above, this field may limit the Maximum bandwidth supported by the UE, which may reduce power consumption and prevent overheating.
In LTE, Carrier Aggregation (CA) refers to a process of aggregating two or more Component Carriers (CCs) in order to support a wider transmission bandwidth (e.g., a bandwidth of up to 100 MHz). Depending on the capability of the UE, the UE may receive or transmit simultaneously on one or more CCs. When configured as CA, the UE may maintain an RRC connection with the network. A serving cell that manages RRC connection of the UE is referred to as a primary cell (Pcell), and a secondary cell (Scell) may form a set of serving cells together with the Pcell. In CA, UEs may be scheduled simultaneously via PDCCHs on multiple serving cells. Cross-carrier scheduling using a Carrier Indicator Field (CIF) allows a PDCCH of a serving cell to schedule resources on another serving cell. That is, a UE receiving a downlink assignment on one CC may receive associated data on another CC. The following assistance information related to CA for NR may be included in LTE UEAI.
Reduced Component Carriers (CC) DL/UL NR (adjust the number of DL/UL CCs used for NR) — if the number of DL/UL CCs is Reduced, the UE processing load can be Reduced and the heat generation is also Reduced accordingly.
Preferred Scell inactivity timer value NR (adjust Scell inactivity timer for NR) -if Scell is not used, it may be deactivated after the timer expires. Controlling this value can have an impact on UE power savings/heating depending on traffic load and needs. This timer change is similar to a BWP timer change in that the faster the Scell connectivity is deactivated, the faster the processing load decreases, and the faster the power consumption can also decrease.
Currently, it is desirable for a UE to report up to four (4) different DL beams. The following assistance information related to beam measurements and/or reports for NR may be included in LTE UEAI.
Preferred maximum number of DL beams to report NR-this field can potentially reduce UE power consumption and heat for measurements and UL transmissions if the reporting requirements are reduced. In other words, reducing the number of beams to report may improve processing load and power consumption.
Preferred minimum SRS transmission period NR (adjusting the minimum SRS [ sounding reference signal ] transmission period for NR) -increasing the minimum SRS transmission period can reduce UE power consumption and heat at the cost of reduced UL beam management performance. Increasing the SRS transmission period means reducing instances of SRS transmission, thereby reducing load/power consumption.
Preferred minimum CSI report period (adjust minimum CSI [ channel state information ] reporting period for NR) -increasing the minimum CSI reporting period can reduce UE power consumption and heat at the expense of DL degradation of beam management performance.
DRX related values/parameters defined in LTE for NR may also be included in LTE UEAI, as controlling DRX parameters may have an impact on UE power consumption and heat generation during both connected and idle modes.
Preferred On-Duration timer value NR (adjusting the On-Duration value for NR)
Preferred DRX Inactivity timer value NR (adjusting DRX Inactivity timer value for NR)
Preferred short DRX cycle NR (adjusting short DRX cycle value for NR)
Preferred DRX short Cycle-Timer value NR (adjusting DRX short Cycle Timer value for NR)
Preferred Long DRX Cycle Start Offset value NR (adjusting Long DRX Cycle Start Offset value for NR)
Preferred HARQ RTT timer value NR (adjusting HARQ RTT timer value for NR)
Preferred DRX Retransmission Timer NR (adjusting DRX Retransmission Timer value for NR)
Preferred DRX cycle NR (adjusting DRX cycle value for NR)
NR supports two different types of UL. Normal UL and supplemental UL (sul). In addition, NR also supports ACK bundling, where multiple ACKs corresponding to different respective DL transmissions can be combined into a single ACK. ACK bundling may reduce load/power consumption if the ACK bundling is implemented by the UE. The UE may communicate its preferences to the network to enable the feature. Accordingly, the UEAI may also include the following fields.
Preferred UL types NR (UL type set for NR UE) -UE transmits a bitmap indicating whether it prefers only UL or only SUL or both. In the case where only one UL type is supported, the UE may turn off another transmission chain, which may save power and reduce heat generation.
ACK bundling predicted NR (ACK bundling enabled/disabled for NR UE) -the UE may indicate to the network whether it prefers to enable ACK bundling for PDSCH transmission. Enabling ACK bundling can potentially reduce the on time of one of these transmission chains.
Fig. 6 illustrates an example timing diagram showing transmission of an LTE RRC message including UE assistance information for NR, according to some embodiments. When both the network and the UE support any feature (or operating parameter), information related to that feature may be transmitted from the UE to the network (eNB and gNB), and the network allows the UE to transmit that information/request. The UE ai may include information/requests for LTE only or NR only, or both, depending on the reason for transmitting the UE ai and/or the request for feature/operating parameter adjustment identified by the UE. Once the LTE eNB receives the UEAI for the NR, the eNB may forward this information to the gNB. Upon receiving the respective ue ai/request, the eNB (ue ai for LTE) and/or the gNB (ue ai for NR) may fulfill the request or may reject the request. This decision may be made independently by the eNB and the gNB. In some embodiments, the prohibit timer may be implemented in both the eNB and the gNB, and the prohibit time may be reset each time the UE ai is reported from the UE. The UE may not transmit additional UE ai while the timer is running.
As shown in fig. 6, the UE 106 may transmit a UEAI (or feature/operational parameter adjustment request) for LTE and NR to the eNB 604 in message 610 (e.g., in an LTE RRC message). eNB 604 may transmit the UEAI for the NR included in message 610 to the gNB606 in a second message 612. Subsequently, DL/UL transmissions 614 may occur between the UE 106 and the eNB 604 with or without adjustment of UE capabilities by the eNB 604 based on the UE assistance information (for LTE). Similarly, DL/UL transmissions 616 may occur between UE 106 and gNB606 with or without adjustment of UE capabilities by gNB606 based on UE assistance information (for NR). The UE 106 may be prompted to transmit the UEAI by issues related to in-device coexistence, overheating, issues related to HW sharing (shared resources), etc.
Option 2
Fig. 7 illustrates an example timing diagram showing transmission of an LTE RRC message including an encapsulated NR RRC message including UE assistance information for NR, according to some embodiments. As previously described, the second method may extend the temporary UE capability adjustment/restriction mechanism for the SA mode of operation to the NSA mode of operation by encapsulating the NR RRC message in an LTE RRC message. In this approach, the eNB may forward an NR temporary capability adjustment (e.g., restriction) request message (or NR RRC message) to the gNB through LTE-RRC signaling. In this case, LTE and NR capabilities may be temporarily adjusted via their own respective mechanisms. For example, a separate NR temporary UE capability adjustment (e.g., restriction) request message or UEAI (similar to LTE UEAI) in the message may be transmitted with the newly introduced fields discussed in detail above with respect to option 1. In other words, in this approach, separate NR messages (e.g., NR RRC messages) may be created and those messages may include any one or more of the UEAI fields discussed with respect to option 1. These NR messages may be encapsulated in LTE messages transmitted by the UE to the eNB, and the eNB may then forward those encapsulated NR messages to the gNB.
As shown in fig. 7, the UE 106 may transmit a UEAI (or feature/operating parameter adjustment request) for LTE to the eNB 704 in message 710 (e.g., in an LTE RRC message). The UE 106 may also transmit to the eNB 704 the UEAI (or feature/operating parameter adjustment request) for NR included in the NR message encapsulated in message 722 in another message 722 (which may be an LTE RRC message). eNB 704 may then forward message 722 to gNB 706 as message 712. Subsequently, DL/UL transmissions 714 may occur between the UE 106 and the eNB 704 with or without adjustment of UE capabilities by the eNB 704 based on the UE assistance information (for LTE). Similarly, DL/UL transmissions 716 may occur between UE 106 and gNB 706 with or without adjustment of UE capabilities by gNB 706 based on UE assistance information (for NR). The UE 106 may be prompted to transmit the UEAI by issues related to in-device coexistence, overheating, issues related to HW sharing (shared resources), etc.
Option 3
Fig. 8 illustrates an example timing diagram showing transmission of an LTE RRC message including UE assistance information and transmission of a separate NR RRC message including UE assistance information, in accordance with some embodiments. As previously described, the third method may include transmitting separate requests and/or UEAIs for LTE and NR to respective corresponding base stations. This approach may be used when no interaction is required between different base stations operating according to different RATs (e.g., between the eNB and the gNB). For example, even if a UE is operating in NSA mode, if the UE requests an adjustment to a particular feature in the NR cell for any reason (e.g., due to overheating), the gNB may reconfigure the UE independently with only the configuration that affects NR communications, while the number of CCs used for LTE communications remains the same. LTE has the same possibility, with adjustments made only for LTE communications, and not for NR communications. Of course, both RATs may be adjusted according to the respective messages transmitted by the UE to the base station. The UE may send the LTE side request via LTE messaging (e.g., LTE RRC messages) and the NR side request via NR messaging (e.g., NR RRC messages). The UE may determine whether to adjust (e.g., limit) capabilities of either or both LTE or NR communications. In this way, LTE and NR capabilities may be temporarily adjusted via their own respective mechanisms. In this approach, separate NR messages (e.g., NR RRC messages) may be created and transmitted by the UE directly to the gNB, and may include any one or more of the UEAI fields discussed with respect to option 1.
As shown in fig. 8, the UE 106 may transmit a UEAI (or feature/operating parameter adjustment request) for LTE to the eNB 804 in message 810 (e.g., in an LTE RRC message). UE 106 may also transmit a UEAI (or feature/operating parameter adjustment request) for NR to the gNB 806 in another message 812 (which may be an NR RRC message). Subsequently, DL/UL transmissions 814 may occur between the UE 106 and the eNB 704 with or without adjustment of UE capabilities by the eNB 804 based on the UE assistance information (for LTE). Similarly, DL/UL transmissions 816 may occur between UE 106 and gNB 806 with or without adjustment of UE capabilities by gNB 806 based on UE assistance information (for NR). The UE 106 may be prompted to transmit the UEAI by issues related to in-device coexistence, overheating, issues related to HW sharing (shared resources), etc. It should be noted that as shown in fig. 8, the temporary capability adjustment is fully supported during the SA mode of operation since the UE 106 transmits directly to the gNB.
Temporary capability update
Once the UE has transmitted a UE ai and/or temporary capability adjustment (e.g., restriction) request to the eNB and/or gNB, the UE may explicitly notify the (respective) network by sending another message after determining that the problem (which prompted the transmission of the UE ai and/or temporary capability adjustment request) has been resolved. The UE may do this by transmitting a new UE ai that may be directed to actually restoring the previous settings and/or only to a new set of preferred capabilities. The UE may similarly transmit a temporary UE capability adjustment request with a new set of preferred capability values. The new set of preferred capability values may include either the standard capability or another set of relaxed, reduced capabilities. In some embodiments, the network may operate an internal timer during which the network meets adjusted (e.g., reduced) UE capabilities. The timer value may be set to a sufficiently long value for any problem that prompted the original ue ai/request to be resolved. Once the timer expires, the network may restore the UE capabilities to the original or standard capability values of the UE.
Temporary capability adjustment (e.g., restriction) of SA operation mode
Any newly introduced temporary UE capabilities for NR (e.g., those described above with respect to option 1) may also be used for temporary UE capability adjustment (e.g., capability limitation) for SA mode of operation. In this case, the UE may transmit a temporary capability adjustment (e.g., temporary capability limit) request directly to the gNB.
Connected mode and idle mode
The UE capabilities may be temporarily adjusted while the UE is in connected mode via RRC signaling, as described in detail above. If the UE moves to an idle state while its capabilities are adjusted (e.g., its capabilities are limited), the network may interpret the state of the UE and its capabilities in at least two different ways. In some embodiments, the ability to make any temporary adjustments may be released once the UE moves to the idle state. Alternatively, the network may only retain the reduced capability value when the UE moves to the idle state.
If the UE utilizes the network for RRC reestablishment, the network can again interpret the state of the UE and its capabilities in at least two different ways. In some embodiments, the network and the UE may revert to default (or standard/normal) UE capabilities. Alternatively, the network and the UE may retain/continue to use the previously adjusted capability value.
Embodiments of the invention may be implemented in any of various forms. For example, in some embodiments, the invention may be implemented as a computer-implemented method, a computer-readable memory medium, or a computer system. In other embodiments, the invention may be implemented using one or more custom designed hardware devices, such as ASICs. In other embodiments, the invention may be implemented using one or more programmable hardware elements, such as FPGAs.
In some embodiments, a non-transitory computer-readable memory medium (e.g., a non-transitory memory element) may be configured such that it stores program instructions and/or data, wherein the program instructions, if executed by a computer system, cause the computer system to perform a method, e.g., any of the method embodiments described herein, or any combination of the method embodiments described herein, or any subset of any of the method embodiments described herein, or any combination of such subsets.
In some embodiments, a device (e.g., a UE) may be configured to include a processor (or a set of processors) and a memory medium (or memory element), wherein the memory medium stores program instructions, wherein the processor is configured to read and execute the program instructions from the memory medium, wherein the program instructions are executable to implement any of the various method embodiments described herein (or any combination of the method embodiments described herein, or any subset of any of the method embodiments described herein, or any combination of such subsets). The apparatus may be embodied in any of various forms.
Although the above embodiments have been described in considerable detail, numerous variations and modifications will become apparent to those skilled in the art once the above disclosure is fully appreciated. It is intended that the following claims be interpreted to embrace all such variations and modifications.

Claims (20)

1. An apparatus, comprising:
a processor configured to cause a wireless communication device, UE:
wirelessly communicating with a first base station according to a first radio access technology, RAT, wherein the first base station is a new radio, NR, base station, gNB, and the first RAT is NR; and
transmitting assistance information to the first base station, wherein the assistance information comprises a first preferred value for a first operating parameter of the UE corresponding to timing information for communicating in accordance with the first RAT, wherein the first operating parameter comprises:
k0, K0 is associated with the time difference between the transmission of the physical downlink control channel PDCCH and the physical downlink shared channel PDSCH, an
K2, K2 is associated with the time difference between the transmission of PDCCH and physical uplink shared channel, PUSCH; and
one of the following:
in response to the first base station adjusting the first operating parameter according to the first preference value, transmitting with the first base station according to the adjusted first operating parameter; or
In response to the first base station not adjusting the first operating parameter, transmitting with the first base station according to the unadjusted first operating parameter.
2. The apparatus of claim 1, wherein the processor is configured to further cause the UE to transmit the assistance information in a first RAT radio resource control message.
3. The apparatus of claim 1, wherein the processor is configured to further cause the UE to transmit the assistance information in response to an operational issue with the UE.
4. The device of claim 3, wherein the operational issue comprises one or more of:
the UE is overheating;
the UE consumes more than a specified amount of power;
in-device coexistence capabilities within the UE; or
Hardware sharing within the UE.
5. The apparatus of claim 1, wherein the processor is configured to further cause the UE to:
encapsulating the first RAT radio resource control message in a second RAT radio resource control message, wherein the first RAT radio resource control message comprises a second preference value; and
transmitting a second RAT radio resource control message to a second base station;
wherein the second RAT radio resource control message is to be forwarded by the second base station to a third base station, and wherein the second preference value corresponds to one or more second operational capabilities associated with the UE communicating with the third base station in accordance with the first RAT.
6. The apparatus of claim 1, wherein the processor is configured to further cause the UE to transmit a message to the first base station, wherein the message indicates that the first operating parameter no longer needs to be adjusted.
7. The apparatus of claim 1, wherein the processor is configured to further cause the UE to transmit with a first base station according to the unadjusted first operating parameter upon expiration of a first timer in the first base station.
8. A wireless communication device, UE, comprising:
radio circuitry configured to wirelessly communicate with a first base station according to a first radio access technology, RAT, wherein the first base station is a new radio, NR, base station, gNB and wherein the first RAT is an NR;
a processor configured to:
transmitting assistance information to the first base station via the radio circuitry, wherein the assistance information comprises a first preferred value for a first operating parameter of the UE corresponding to timing information for communicating in accordance with the first RAT, wherein the first operating parameter comprises:
k0, K0 is associated with the time difference between the transmission of the physical downlink control channel PDCCH and the physical downlink shared channel PDSCH, an
K2, K2 is associated with the time difference between the transmission of PDCCH and physical uplink shared channel, PUSCH; and
via the radio circuitry:
in response to the first base station adjusting the first operating parameter according to the first preference value, transmitting with the first base station according to the adjusted first operating parameter; or
In response to the first base station not adjusting the first operating parameter, transmitting with the first base station according to the unadjusted first operating parameter.
9. The UE of claim 8, wherein the processor is further configured to transmit the assistance information in a first RAT radio resource control message.
10. The UE of claim 8, wherein the processor is configured to transmit the assistance information in response to an operational issue of the UE.
11. The UE of claim 10, wherein the operational issue comprises one or more of:
the UE is overheating;
the UE consumes more than a specified amount of power;
in-device coexistence capabilities within the UE; or
Hardware sharing within the UE.
12. The UE of claim 8, wherein the processor is configured to:
encapsulating the first RAT radio resource control message in a second RAT radio resource control message, wherein the first RAT radio resource control message comprises a second preference value; and
transmitting a second RAT radio resource control message to a second base station;
wherein the second RAT radio resource control message is to be forwarded by the second base station to a third base station, and wherein the second preference value corresponds to one or more second operational capabilities associated with the UE communicating with the third base station in accordance with the first RAT.
13. The UE of claim 8, wherein the processor is configured to transmit a message to the first base station, wherein the message indicates that the first operating parameter no longer needs to be adjusted.
14. The UE of claim 8, wherein the processor is configured to:
transmitting with the first base station according to the unadjusted first operating parameter upon expiration of a first timer in the first base station.
15. A method, comprising:
wirelessly communicating with a first base station according to a first radio access technology, RAT, wherein the first base station is a new radio, NR, base station, gNB, and the first RAT is NR;
transmitting assistance information to the first base station, wherein the assistance information comprises a first preferred value for a first operating parameter corresponding to timing information for communicating in accordance with the first RAT, wherein the first operating parameter comprises:
k0, K0 is associated with the time difference between the transmission of the physical downlink control channel PDCCH and the physical downlink shared channel PDSCH, an
K2, K2 is associated with the time difference between the transmission of PDCCH and physical downlink shared channel, PUSCH; and
one of the following:
in response to the first base station adjusting the first operating parameter according to the first preference value, transmitting with the first base station according to the adjusted first operating parameter; or
In response to the first base station not adjusting the first operating parameter, transmitting with the first base station according to the unadjusted first operating parameter.
16. The method of claim 15, further comprising transmitting the assistance information in a first RAT radio resource control message.
17. The method of claim 15, further comprising transmitting the assistance information in response to an operational issue.
18. The method of claim 17, wherein the operational issue comprises one or more of:
overheating;
consuming more than a specified amount of power;
in-device coexistence performance; or
And (4) sharing hardware.
19. The method of claim 15, further comprising:
transmitting a message to the first base station, wherein the message indicates that the first operating parameter no longer needs to be adjusted.
20. The method of claim 15, further comprising:
transmitting with the first base station according to the unadjusted first operating parameter upon expiration of a first timer in the first base station.
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